On the left side of the equation is one or more response variables, Y. On the right hand side is one or more predictor variables, X, and their coefficients, B. X, the variables on the right hand side can have many forms and are called by many names.
Subscribe to our Digestive Health e-newsletter to stay up to date on digestive health topics. The exact cause of ulcerative colitis remains unknown. Previously, diet and stress were suspected, but now doctors know that these factors may aggravate but don't cause ulcerative colitis.One possible cause is an immune system malfunction.reviously, diet and stress were suspected, but now doctors know that these factors may aggravate but don't cause ulcerative colitis.
What causes irritable bowel syndrome? There is no specific cause of IBS but many people living with IBS appear to have a hypersensitive colon. A number of factors can contribute to IBS including worry and emotional stress. Eating, as well as certain foods and medicines, can trigger colon spasms and cause symptoms associated with IBS.